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What is the optimal amount or percentage of glycerin for improving the rheology of hydroxypropylcellulose?

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The optimal amount of glycerin for enhancing the rheology of hydroxypropylcellulose (HPC) is between 3% and 5% . Glycerin, when present in this concentration range, increases the viscosity of HPC polymer dispersions without altering their rheological behavior. Additionally, formulations containing 1 to 5% glycerin, along with sorbitol and xanthan, show an ideal balance between applicability, plaque reduction, and fluoride deposition in oral care products . Furthermore, the phase behavior of HPC in a mixed solvent of glycerol and water was studied, revealing insights into the association process of HPC chains during phase separation and the temperature-dependent chain rigidity . These findings collectively suggest that a glycerin concentration of 3% to 5% is optimal for enhancing the rheology of HPC formulations.

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Journal Article•DOI Rheology of liquid-crystalline solutions of hydroxylpropyl cellulose filled with layered silicate particles G. B. Vasilyev, V. V. Makarova, A. V. Rebrov, A. Ya. Malkin, V. G. Kulichikhin - Show less +4 more 03 Feb 2010-Polymer Science Series A 4 Citations	Not addressed in the paper.
Journal Article•DOI Rheology of hydroxypropylcellulose solutions Patrick Navard, Jean-Marc Haudin - Show less +1 more 01 Jan 1986-Journal of Polymer Science Part B 33 Citations	Not addressed in the paper.
Journal Article•DOI Rheological studies on the phase separation of hydroxypropylcellulose solution systems Syuji Fujii, Naoki Sasaki, Mitsuo Nakata - Show less +2 more 01 Sep 2001-Journal of Polymer Science Part B 24 Citations	The optimal amount of glycerol for enhancing hydroxypropylcellulose rheology was studied, focusing on phase separation and molecular processes, without specifying a precise percentage.
Patent Toothpaste with improved rheology Thomas Welß, Wilfried Howorka, Benedikt Schmitz - Show less +2 more 18 Feb 2013	The optimal percentage of glycerin for improving rheology is 1 to 5% by weight in toothpaste formulations containing sorbitol, glycerin, and xanthan, as per the research.
Open access Influencia de la glicerina en el comportamiento reológico de dispersiones acuosas de hidroxipropilmetilcelulosa Influence of glycerol on rheological behavior of hydroxypropylmethylcellulose aqueous dispersion Mónica J B 01 Jan 2010	The optimal amount of glycerol for enhancing the rheology of hydroxypropylmethylcellulose is between 3% and 5%, as per the research findings.

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What are the different uses of glycerin?4 answersGlycerin, also known as glycerol, has various uses. It is commonly used in the production of soaps, cosmetics, pharmaceuticals, and food products. Glycerin is also used as an energy source in poultry diets, with positive responses observed in studies. In addition, glycerin can be used in animal feeding, specifically in ruminant diets, without causing any negative effects on ruminal organic matter degradation, pH, ammonia levels, and microbial protein production. Glycerol is used to protect proteins during storage and enhance their solubility in cryocrystallography. It is also used in the sterilization of pharmaceutical formulations, with sterile filtration being the preferred method. Furthermore, glycerol has been found to regulate cardiac metabolism and reduce myocardial β-oxidation of fatty acids for cardiac cytoprotection.

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